Machine for surfacing butcher-blocks.



H E PPEIFFER MACHINE PoR SURPAGING BUTCHBR BLOCKS.

APPLICATION FILED AUG.14, 1908.

Patented May 11,1909.,

2 SHEETS-SHEET l.

@Wine/.mea

whatwe@ s H. E'. PFEIFFER. MAGHINE FOB. SURFGING BUTGHEB BLOCKS.

APPLICATION FILED AUG.14& 1908. l* 921 ,4:51. Patented May 11, 1909.

@mi ha use@ co., wAsmNcmN. a. c4

vided thereon one of which is rigidly attached to the feed screw 32. A Vfeed screw handle 39 is also attached to this feed screw so that the same may be rotated by hand if desired.

Qigidly attached to the under side of the lower arm of the bracket 13 is a gear 40. Supported in a bracket 41 attached to the upper side of the bar 27 and in the upturn ed end 37 of said bar is a telescopic shaft 42, on which is mounted one of the train of gears 3S at the outer end and which carries a gear 43 at the inner end meshing with the gear 40.

For the purpose of holdin@ the parts in adjusted relation there are provided collars 44 secured by means of set screws 45 at whatever points may be desired.

For the purpose of understanding' the operation o'f the device the upper surface of a butcher block has been indicated in Fig. l at 46, but little more than one half of said surface being shown.

When it is desired to dress the surface of a block such as 46, the arm 27 is so positioned relative to the block 25 that th"l extreme end of the arm will slightly overlap the odge of said block and the tool holder 34 run out to just contact with said edge, when the device is in position. A substantially central point is then located and the spindle 1G is screwed therein. The standards 20 are attached firmly to the floor and the tolescoping portion adjusted so as to bring the shaft 17 to a level, The tool is now set to the proper depth of cut desired and the handle 2i ro tated. This rotates the gear 26 which in turn rotates the gear 22 and carries around the arm 27 through its attachment 25. At the same time that this takes place the gear 43 moves around the gear 40, the latter being held.stationaryfby its attachment to the bracket 13, and this causes the rotation of the shaft 42. By means of the train of gears 38 the rotation of the shaft 42 in turn rotates the shaft 32 and causes the tool holder 33 to move inward as the arm 27 revolves around the spindle. The path of the tool is thus made spiral and the entire surface of the block is gone over and dressed down to an even and level surface. ln case one cutting is not sufficient to accomplish this purpose, the tool holder may be run out to the end a second or third time by means of the handle 39, one of the gears 38 being unkcyed to permit the accomplishment of this without it being necessary to rotate the arm 27, and the operation repeated after the tool has been reset. The surface ofthe block is thus brought into the proper condition, and it will be noted that this is accomplished with less labor and skill than where it is attempted to surface the block by means of the ordinary hand plane or scraper.

lt is obvious that changes may be made in the form and construction of this device without departing from the material principles thereof. It is not therefore desired to confine the invention to the exact form herein shown and described, but it is wished to include all such as properly come within the scope thereof.

VHaving thus described the invention, what is claimed as new, is:-w

i. ln a device of the kind described, a spindle adapted for attachment to a butcher block, a sleeve mounted for rotation around the spindle, a block attached to the sleeve, a gear rigid with the sleeve, a second gear meshing with the first mentioned gear, a bracket mounted on the spindle, a shaft supported in the bracket and carrying the second gear, standards supporting the outer end of the shaft, means for rotating the shaft to cause the block to move around the spindle, a third gear rigidly attached to the bracket, a tool carrying arm adjustably attached to the block, a force gear meshing with the third gear, a telescopic shaft on the arm carrying the force gear, a feed screw supported on the arm, a train of gears connecting the telescopic shaft and feed screw, a tool holder supported on the feed screw, and a tool carried by the tool holder.

2. ln a device of the kind described, a spindle adapted for attachment to a butcher blc-ck, a sleeve mounted for rotation around said spindle, a block rigidly attached to said sleeve, a gear rigidly attached to said sleeve, a second gear meshing with the first mentioned gear, a bracket mounted on said spindlc, -a shaft supported in said bracket and carrying said second gear, standards. supporting the outer end of said shaft, a crank handle arranged to rotate said shaft and cause the block to move around the spindle, a third gear rigidly attached to said bracket, a tool-carrying arm adjustably attached to said block, a force gear meshing with the third gear, a telescopic shaft on said arm car rying said force gear, a feed screw supported on said arm, a train of gears connecting said telescopic shaft and feed screw, a tool holder supported on said feed screw, and a tool carried in said tool-holder.

ln testimony that I claim the foregoing as my own, l have hereto affixed my signature in the presence of two witnesses.

HENRY E. PFEIFFER.

lflfitnesses:

CARL RELF, M. E. BALTZER. 

